I do. That is what I am using to power my speakers on my cart. I have the amp and both speakers mounted inside a tube (bass tube). I have a headphone jack flush mounted on the outside of the tube that I plug my ipod/cell phone into. The power cable is a converted 12V cigarette lighter style plug. i'll try and snap some pics and post them.

I got an ipod amp off ebay for a penny with $11 shipping, super small, stays hid in drivers side glove box. It was from China and took almost 2 weeks to get it, but for a penny you can't beat it. I've had it now for almost a year.